semidiameter

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sem·i·di·am·e·ter

 (sĕm′ē-dī-ăm′ĭ-tər, sĕm′ī-)
n.
The apparent radius of a celestial body when viewed as a disk from Earth.

semidiameter

(ˌsɛmɪdaɪˈæmɪtə)
n
the apparent radius of a star or other celestial body when viewed from Earth

sem•i•di•am•e•ter

(ˌsɛm i daɪˈæm ɪ tər, ˌsɛm aɪ-)

n.
half of a diameter.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.semidiameter - the apparent radius of a celestial body when viewed as a disc from the earth
radius, r - the length of a line segment between the center and circumference of a circle or sphere
Translations
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References in classic literature ?
Thus let be the horizontal parallel, and p the apparent semidiameter "
is provided by the formula [40] [phi](x, y) = -(([a.sup.2][k.sub.2] - [b.sup.2][k.sub.1])/ ([a.sup.2][k.sub.2] + [b.sup.2][k.sub.1]))xy + c, with c [member of] R, [k.sub.1], [k.sub.2], [k.sub.3] [member of]]0, +[infinity][ and a, b lengths of the ellipse semidiameters. Plots of the shear modulus [[mu].sub.x] and of the warping [phi] are provided in Figures 1 and 2.
The semidiameters of low frequency arcs of steel electrodes coated with HYC are larger than those of steel electrodes coated with HYG.